also included a primary school, a nursery and three churches. Foamed concrete was selected for the large-scale infilling of the old mine works: the single largest application of foamed concrete on a project in the UK. The work was largely complete by November 2009, by which time approximately 600,000 cubic metres of foamed concrete had been used to fill 25 hectares of very shallow limestone mine, making it the largest project of its kind in the world. Biological interest The site was notified as a Site of Special Scientific Interest in 1991, for its importance as a hibernation site for several species of bat, including Greater and Lesser Horseshoe. Since 2005 it has formed part of the Bath and Bradford-on-Avon Bats Special Area of Conservation. References External links Photographs of the inside of the mine Buildings and structures in Bath, Somerset History of Bath, Somerset Sites of Special Scientific Interest in Avon Sites of Special Scientific Interest notified in 1991 Underground mines in England Mines in Somerset Combe Down